'LITTLE JETS OF WHEEZING LAUGHTER FOLLOWED ONE ANOTHER OUT OF HIS CONVULSED BODY. HIS EYES, TWINKLING WITH CUNNING ENJOYMENT, GLANCED AT EVERY MOMENT TOWARDS HIS COMPANION'S FACE.' 'WHEN HE WAS QUITE SURE THAT THE NARRATIVE HAD ENDED HE LAUGHED NOISELESSLY FOR FULLY HALF A...